Skip to main content

Final Reports from the NIST Investigation of the World Trade Center Disaster

This collection contains the final reports for the Investigation into the collapses of the World Trade Center Towers (WTC 1 and WTC 2) and into the collapse of World Trade Center Building 7 (WTC 7.)

57
RESULTS


texts 57

PART OF
NIST WTC Repository

LANGUAGE
english 57
SHOW DETAILS
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101041
NIST Manuscript Publication Search This report describes the provisions that were used to design and construct World Trade Center 1, 2, and 7. Included is a summary of the major provisions in the codes and standards together with the loads and load combinations that were used to design the buildings. Methods used to proportion structural members and other components of the buildings are also discussed, as well as tests that were performed to support the design. It is shown that the loads that...
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101334
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101001
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101012
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101046
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101332
NIST Manuscript Publication Search This report provides technical documentation of how NIST reconstructed the effects of the events on September 11, 2001 on WTC 7. This includes how the fires that followed the impact of debris from the collapse of WTC 1 (the north tower) led to the collapse of WTC 7; an evaluation of the building evacuation and emergency response procedures; what procedures and practices were used in the design, construction, operation, and maintenance of the building; and...
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861611
NIST Manuscript Publication Search This is the final report on the National Institute of Standards and Technology (NIST) investigation of the collapse of the World Trade Center (WTC) towers, conducted under the National Construction Safety Team Act. This report describes how the aircraft impacts and subsequent fires led to the collapse of the towers after terrorists flew jet fuel laden commercial airliners into the buildings; whether the fatalities were low or high, including an evaluation of...
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909017
NIST Manuscript Publication Search This report describes how the fires that followed the impact of debris from the collapse of WTC 1 (the north tower) led to the collapse of WTC 7; an evaluation of the building evacuation and emergency response procedures; what procedures and practices were used in the design, construction, operation, and maintenance of the building; and areas in current building and fire codes, standards, and practices that warrant revision. Also in this report is a summary of...
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861610
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101000
NIST Manuscript Publication Search The September 11, 2001, attack on the World Trade Center (WTC) caused the deaths of 2,749 people. Included in the group were approximately 421 emergency responders from The Fire Department of the City of New York (FDNY), The New York City Police Department (NYPD), the Port Authority Police Department (PAPD), The Port Authority of New York and New Jersey (PANYNJ), from WTC security firms, and volunteer emergency responders who were in the WTC area of the city...
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101049
NIST Manuscript Publication Search This report was prepared to support the analysis of building and fire codes and standards of the National Institute of Standards and Technology World Trade Center (WTC) Investigation. The purpose of this report is to document the Port Authority of New York and New Jersey guidelines for inspection, repair, and modifications to fire protection and egress systems in WTC 1, 2, and 7. This includes guidelines governing the inspection and upgrading of fire alarm and...
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101343
NIST Manuscript Publication Search This report documents maintenance and modifications that were made to the structural systems of World Trade Center (WTC) 1,2, and 7. Included are the Port Authority of New York and New Jersey (PANYNJ or Port Authority) guidelines for inspection, repair, and modifications to the structural systems of WTC 1, 2, and 7. Discussed are the guidelines that governed the inspection and strengthening of existing structural members. Also contained in this report is a...
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101003
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101416
NIST Manuscript Publication Search This report summarizes the collection and analysis of visual material used for the National Institute of Standards and Technology (NIST) World Trade Center (WTC) Investigation. The task consisted of four major subtasks: 1) identification, collection, data basing, and cataloging of visual material, 2) timing of material incorporated into the NIST visual database, 3) development of fire time lines and additional analyses based on the visual material, and 4)...
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101356
NIST Manuscript Publication Search Simpson Gumpertz & Heger Inc (SGH) developed global models of the World Trade Center (WTC) towers using finite elements to gain an understanding of the roles of the aircraft impact damage and the subsequent fires in the WTC towers with respect to structural stability and sequential failures of components and subsystems and to determine the probable sequence of structural responses that led to initiation of global collapse. The study was conducted as part...
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101366
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101013
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101017
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101021
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101039
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101279
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101019
Final Reports from the NIST Investigation of the World Trade Center Disaster
by Hamins, A. P.; Maranghides, A.; McGrattan, K. B.; Johnsson, E. L.; Ohlemiller, T. J.; Donnelly, M. K.; Yang, J. C.; Mulholland, G. W.; Prasad, K. R.; Kukuck, S. R.; Anleitner, R.; McAllister, T. P.
293
0
0
NIST Manuscript Publication Search Reconstructing the fires and their impact on structural components in the World Trade Center (WTC) buildings on September 11, 2001, requires extensive use of computational models. For the use of such models to be a viable investigative tool, it is essential to know the accuracy with which they capture the physical phenomena of the fires and the concurrent heat transfer to the building structure. This report documents a series of large-scale experiments that...
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101034
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101359
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101352
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101016
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101005
NIST Manuscript Publication Search The collapse of World Trade Center (WTC) 1, 2, and 7 resulted from structural damage from direct and indirect effects of aircraft impact and the ensuing fires. Thus, for collapse analyses of these buildings, knowledge of the physical state of the structural and fire safety systems prior to the aircraft impact is essential. To obtain information for the collapse analysis of the buildings, National Institute of Standards and Technology reviewed design and...
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909014
NIST Manuscript Publication Search This report analyzes the global response of WTC 7 to fire-induced structural failures and the resulting sequence of component and subsystem failures to determine the events that led to the global collapse of the building. The analysis involved a finite element model of the entire building, which was developed in LS-DYNA. Preliminary work involved two-story and 14 story subassemblies. The 47 story global model was based on the original structural drawings as...
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861612
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101030
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101425
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101428
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101026
NIST Manuscript Publication Search The collapse of World Trade Center (WTC) 1, 2, and 7 resulted from structural damage from direct and indirect effects of aircraft impact and the ensuing fires. Thus, for collapse analyses of these buildings, knowledge of the physical state of the structural and fire safety systems prior to the aircraft impact is essential. To obtain information for the collapse analysis of the buildings, National Institute of Standards and Technology reviewed design and...
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909013
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101035
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101351
Final Reports from the NIST Investigation of the World Trade Center Disaster
by Zarghamee, M. S.; Bolourchi, S.; Eggars, D. F.; Erbay, O. O.; Kan, F. W.; Kitane, Y.; Barrett, P. R.; Gross, J. L.; McAllister, T. P.; Liepins, A. A.; Mudlock, M.; Naguib, W. I.; Ojdrovic, R. P.; Sarawit, A. T.
244
0
0
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101043
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101004
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101420
NIST Manuscript Publication Search This report was prepared to support the analysis of building and fire codes and practices of the National Institute of Standards and Technology (NIST) World Trade Center (WTC) Investigation. This report supports the objective of documenting the requirements that governed the design and construction of WTC 1, 2, and 7. The purpose of this report is to provide an evolution of the life safety provisions of the Building Code of the City of New York (BCNYC) since...
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101007
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101353
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101006
NIST Manuscript Publication Search The objective of this report was to analyze the aircraft impacts into each of the World Trade Center (WTC) towers to provide the following: (1) estimates of probable damage to structural systems due to aircraft impact, including exterior walls, floor systems, and interior core columns; (2) estimates of the aircraft fuel dispersal during the impact; (3) estimates of debris damage to the interior tower contents,including partitions and workstations. Thus, this...
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101015
NIST Manuscript Publication Search A series of large-scale experiments were conducted in the National Institute of Standards and Technology (NIST) Large Fire Laboratory from November 4 to December 10, 2003, to assess the accuracy with which the NIST Fire Dynamics Simulator (FDS) predicts the thermal environment in a burning compartment. In addition, the experiments established a data set to validate prediction of the heat release rate associated with the burning of office furnishings similar in...
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101033
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101022
NIST Manuscript Publication Search This report summarizes the collection and analysis of visual material used for the National Institute of Standards and Technology (NIST) World Trade Center (WTC) Investigation. The task consisted of four major subtasks: 1) identification, collection, data basing, and cataloging of visual material, 2) timing of material incorporated into the NIST visual database, 3) development of fire time lines and additional analyses based on the visual material, and 4)...
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101358
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101010
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101009
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101036
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101028
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101430
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101422
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101042
NIST Manuscript Publication Search This report describes the occupant evacuation of World Trade Center (WTC) 1 and WTC 2 on September 11, 2001. Multiple sources of information were collected and analyzed: over 1,000 new interviews with survivors (including 803 telephone interviews, 225 face-to-face interviews, and 5 focus groups); over 700 published interviews; 9-1-1 emergency calls; transcripts of emergency communications, historical building design drawings, memoranda, and calculations;...
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909016
NIST Manuscript Publication Search
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101432
NIST Manuscript Publication Search The baseline structural performance and aircraft impact damage analysis of the National Institute of Standards and Technology (NIST) Investigation of the World Trade Center (WTC) disaster had two primary tasks: (1) to develop reference structural models of the WTC towers and use these models to establish the baseline performance of each of the towers under gravity and wind loads, and (2) to estimate the damage to the towers due to aircraft impacts and...
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909015
NIST Manuscript Publication Search January 2009 Text Changes to the NIST Reports of the Federal Building and Fire Investigation of the World Trade Center Disaster,NCSTAR 1A, NIST NCSTAR 1-9, and NIST NCSTAR 1-9A. Based on comments received, NIST has made the following changes to the reports on the collapse of World Trade Center Building 7These changes do not alter the findings, conclusions, or recommendations of the NIST NCSTAR 1A or 1-9 reports.
Source: http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901225